Auto Meter Automated Battery Charging Station with six (6) charging channels is for use with 12V batteries (or two 6V batteries in series). The BusPro-620 provides a 5-amp output per channel with a 220V AC input. BusPro Series chargers utilize individual transformers and microprocessors for both low- and high-volume battery-charging applications, allowing each channel to work independently to charge the battery correctly in a timely manner. This unit features two LED lights per channel to visibly indicate whether the unit is connected, charging, topping off, has completed charging, or has a bad or reverse connection. This model charger measures 3" x 8" x 36" overall, and an AC-8 lead set can be purchased separately so that 6 additional batteries can be charged.